>> tonight at eight.more on our developing story. as a cold case heats up. san francisco police release new details and pictures of the prime suspect in the 19- 84 disappearance of 10-year- old kevin collins. investigators are making a plea to the public for information about dan therrien. the man kron 4 first identified as a suspect in the kidnapping. he's the man who at one time. lived in a house just a block away from where collins was last seen. and police are sharing some about his history. grant lodes begins our team coverage with what we've learned so far. grant? >> reporter: dan therrien - has a history of kidnapping and sexual assault involving children. in 1981, therrien was arrested in the fisherman's wharf area for kidnapping and lewd acts on a child. he was bailed out, then did not show up for his court date. in 1982, he was arrested on that outstanding warrant, and pleaded giulty to felony lewd acts on a child. he was sentenced to 6 months in jail and 3 years probation. meanhiwle, therrien was also wanted in canada for a 1973 incident. police say he kidnapped and sexually assaulted 2 children. therrien was initially arrested and charged. but once he was released, he fled canada. police say he was never caught in part because he used many different names. and here are all the names he used.all with different birth years.between 19-47 and 19-56 he went by raymond william stewart. kelly lee dawson.